178 Journal of the Mitchell Society [June 



panded, petal-like form with strongly crimped margins. A good many 

 species have been described in this genus, most of which are certainly 

 Avithont validity. I am including in this species both the form on 

 deciduous aiul that on coniferous wood, but I am not at all sure that 

 they are the same. However, as the basidia and spores cannot be dis- 

 tinguished and there are a number of forms on both kinds of wood, 

 1 have not separated them. 



1073. On an oak log near Howell's spring, October 18, 1911. Drawings. 

 3377. Dead branch of oak, June 28, 1919. Spores 3.7-1.8x8.5-11/^. Photo and 



painting. 

 3852. On pine pole on basketball court of old graded school, December 9, 1919. 



Spores smooth, orange-yellow, elliptic or curved, 3.7-5 x 9-11.1/x. 

 3892. On decaying wood of deciduous tree in Stroud's lowgrounds, December 



13, 1919. 

 3913. On cedar posts at The Eocks, December 16, 1919. 

 3984. On oak wood back of athletic field, January 17, 1920. 

 3998. On a pine rail on a grape arbor, January 22, 1920. 

 4008. On cedar poles, arbor at the Eocks, January 23, 1920. Spores 3.8-6 x 



7J-10.Ofi, a few longer; divided into two cells before sprouting. 



Blowing Eock. Atkinson. 



Common on pine wood. Curtis. 



DITIOLA 



Plants small, centrally stalked or seated by a point, enlarged above 

 with the hymenium over the enlarged part ; at times like a small 

 Peziza, Avith the tlat upper surface covered bj^ the hymenium ; not to- 

 nientose. Flesh toughish-fleshy, only the hymenium gelatinous. Spores 

 elliptic, two- or four-celled before sprouting. Basidia as in Dacry- 

 myces, etc. Distinguished from Guepinia by the smooth stalk (if 

 present) and hymenium not lateral. AVe have found only two species. 



Key to the Species 



Growing on pine, bursting through bark, color orange 



yellow D. radicata (1) 



Growing on deciduous wood; about clay color; very 



small D. aJbizziae (2) 



1. Ditiola radicata (Alb. & Schw.) Fr. 



Plates 49, 50 and 63 



Plants gregarious or crowded into lines or masses up to 1.1 cm. 

 long, 1-5 mm. high, abruptly expanded at top into a horizontally flat- 

 tened, irregular, dull, orange-yellow head, bearing the hymenium, 



